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“Early accurate diagnosis followed by appropriate early and intensive intervention has the potential to significantly decrease lifetime cost while improving functioning and well‐being. Randomized controlled trials indicate that a significant proportion of children with ASD who have access to early intensive behaviorally‐based interventions, including naturalistic developmental and behavioral interventions, starting in the 2nd or 3rd year of life (hereafter EIBI for simplicity) show substantial cognitive and functional gains and symptom improvement relative to eclectic or treatment as usual conditions (Dawson et al., 2010; Eldevik et al., 2009; Granpeesheh et al., 2009; Green et al., 2017; Hardan et al., 2015; Howard et al., 2005; Howlin et al., 2009; Kasari et al., 2008; Lovaas, 1987; Mohammadzaheri et al., 2014; National Research Council Division of Behavioral and Social Sciences Education, 2001; Peters‐Scheffer et al., 2011). Associated with these cognitive and functional gains are significant reductions in ongoing costs, including special education and medical care (Dawson & Bernier, 2013).